Home / 1,380.20-2,064.60-1,258.55

Finding the Fourth Proportional to 1,380.20, 2,064.60 and 1,258.55

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Solution

The fourth proportional to 1,380.20, 2,064.60 and 1,258.55 is: 1,882.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.20 : 2,064.60 = 1,258.55 : x
  2. Step 2: Convert to fraction form
    1,380.20/2,064.60 = 1,258.55/x
  3. Step 3: Cross multiply
    1,380.20x = 2,064.60 × 1,258.55
  4. Step 4: Simplify right side
    1,380.20x = 2,598,402.33
  5. Step 5: Solve for x
    x = 2,598,402.33/1,380.20
  6. Step 6: Final answer
    x = 1,882.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.